Six-wheel truck.



.C. WHITRIDGE 6L G. T. JOHNSON.

SIX WHEEL TRUCK.

APPLICATION FILED IuLY 20. IsI5.

PatentedSept. 14, 1915.

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LVTNESSES J. C. WHITRIDGE & G. T. JOHNSON. SIX WHEEL TRUCK.

APPLICATION FILED .IULY 20. I9I5. 1,153,741. Patentedsept. 14, 1915.

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JOHN C. WHITRDGE AND GEORGE T. JOHNSON, OF COLUMBUS, OHIO, ASSIGNORS TOTHE BUGKEYE STEEL CASTENGS COMPANY, OF4 COLUMBUS, OHIO.

six-wenen TRUCK.

Specification of Letters Patent. Patented Slept. 1915.

appiication'ma :ru1y2o,1s15. serialnaiasoa. 1

To all 'whom t may concern:

Be it known that we, JOHN C..WHITRIDG and GEORGE T. JOHNSON, citizens ofthe United States, a d in the county o?v Franklin and State of Ohio,have invented certain new and useful Improvements in Six-Wheel Trucks;and we do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable .others skilled in theart to which itappertains to make and use the same. v

Our invention relates to an improvement ,in six wheel`trucks for railwaycars, and particularly to the central bolster member thereof whichcarries the body; of the car.

The object of the 'invention is to provide a main bolster having acenter bearing to receive the load of the body of the car and transmitthe same to theauxiliary bolsters at the centers of the length of thelatter, and t section; Fig. 4 is a view in side' elevation of` the mainbolster; Fig. 5 is a view ofsame in lan; Fig. 6 is a view in bottom planAand igs. 7, 8 and 9 are views -in section on the f lines Av--B; C'-Dand E--Fof Fig. 6.

and to secure the necessary depth without interfering with saidmiddleaxle. the bolster is provided with a central opening or passageway 16`for the free passage and movement of the middle axle 11 of the truck,the

4top of' said opening or passageway being closed by a part 12 carryingthe center bearing 13, which is removable so as to lpermit the axle tobe placed in position and removed when necessary. f

`The bolster` 10 resembles aniordinary cast steel truck side lframe,"inthat it is deeper at the center than at the ends, and is made of twoparts 10 and 12. The part 10 is hollow `residents of Columbus,

and provided with openings 14 in its sides, and internally with ribs 15,shown in dotted lines in Figs. 4 and 5 which stilfens the structure atthe parts subjected to the greatlest strains. The part 12 of the bolsterwhich carries the Acenter bearing, is secured centrally to the mainsection 10 thereof and forms a closure for the axle opening 16 in thelatter. This part 12 of the bolster is set into the main section 10, andhas horivzontal bearings v17 and 18 which serve to eso4 to tensile orpullingstresses, while the upper member l2 thereof is subjected tocompressive stresses, and the latter are taken care of by thevhorizontal bearings and shoulders so as to prevent the strains fromfalling on the bolts 21 which secure the part 12 to the main body of thebolster.

The bolster 10 extends lengthwise the truck and is mounted at its .endson seats formed on or in the auxiliary holsters 22 and 23.v Thesebolsters 22 and 23 extend transversely of the truck one being located ina plane between the front axle 24 and the middle axle 11', and the otherin a plane intermediate the middle axle 11 and rear axles 25, and eachis preferably provided withan opening located lcentrally with relationto its ends, for theV reception of the ends of 'the main bolster 10. Theends 26v l of this bolster have flattened andparallel upper and lowerfaces, as shown in Fig. 4

and each 'end is provided with the depending integral lugs 27 adapted tooverhang the end holsters and secure them to the central bolster."

' While the/main bolster may rest on the tops of the'auxili'aryholsters, we prefer to mount them'in openings formed in said auxiliarybolstersl as previously explained, in order to conserve space and bringall the bolsters into proper relation with each other and also with thecentral axle, which is very important, as the vertical distance from therail 'is limited within which to locate the bolster structure of thenecessary strength, and provide for the 'necessary clearance above therails, without, elevating the car ,body above the prescribed level.

The ends of 'the main bolster l0 having A Id integrall lugs thereoninterlocks y with the auxiliary bolster, so that' the weight of the mainbolster and its load are suiicient to retain the former in positionwithout any additional securing devices.

We have not shown or described the construction of truck side frames asour improvement is applicable for use with any that may be used on a sixwheel truck.

It is evident that many slight changes might be resorted to in therelative arrangement of parts shown and described Without departing fromthe spirit and scope of our invention. Hence vwe would have itunderstood that we do not wish to confine ourselves to the exactconstruction and arrangement of parts shown and described, but

Having fully described our invention what we claim as new and desire tosecure b-y Letters-Patent, is:-

1. In a six wheel truck, the combination of auxiliary bolstersextending, transversely of the truck, a'main bolster supported' at itsends on the auxiliary bolsters and provided with an opening for thepassage of the middle axle, the said opening being open at the top, anda removable portion forming a top closure for said opening. 4

2. 'In a six wheel truck, the combination oi auxiliary bolstersextending transversely of the truck, a main bolster supported at itsends on the auxiliary holsters and provided with an opening for thepassage of the middle axle, the said opening being open at the top, anda removable portion forming a closure for said opening, and the centerbearing for the car body.

3. In a six Wheel truck, the combination of a main bolster extendinglengthwise the truck and provided with a transverse pasthe said bolsterextending lengthwise the..

truck, auxiliary bolsters arranged transversely of the truck andsupporting the ends of said main bolster and a removable mem.

ber forming a closure'for the top of the transverse opening in the,longitudinal bolster, and also carrying the centerbearing for the carbody.

5.4 In a six wheel truck, the combination of transverse bolsters and amain bolster extending longitudinally of the truck and havinginterlocking connection with and carried at its ends by said transverseholsters,

the said main bolster having an opening through same for the passage ofthe middle axle of the truck.

In testimony whereof, we have signed this speciication in the presenceof two subscribing witnesses.

JOHN C. WHITRIDGE. GEORGE T. JOHNSON.

Witnesses:

GEO. M. MURPHY, GEORGE F. KRAUss.

